Omega OMG-SIO-530 Owner's manual

Brand: Omega

Model: OMG-SIO-530

Category: Networking

Type: Owner's manual

Contents

INTRODUCTION.....................................................................1

OVERVIEW..................................................................................1

WHAT’S INCLUDED .....................................................................1

FACTORY DEFAULT SETTINGS .....................................................1

CARD SETUP .........................................................................2

PORT ENABLE / DISABLE.............................................................3

IRQ SELECTION..........................................................................3

INTERFACE SELECTION................................................................4

E2 JUMPER SETTINGS ..................................................................4

E1 Jumper setting for RS-232..................................................5

E1 Jumper setting for RS-530 and RS-422 ..............................6

E1 Jumper setting for RS-485..................................................7

E1 Jumper setting for 20 mA Current Loop.............................8

INSTALLATION......................................................................9

TECHNICAL DESCRIPTION..................................................10

CONNECTOR PIN ASSIGNMENTS.................................................11

RS-232..................................................................................11

RS-530/422/485....................................................................11

RS-530/422/485 Line Termination........................................11

20 mA Current Loop.............................................................12

CURRENT LOOP CONNECTIONS..................................................12

Passive Connection ...............................................................12

Active Connection.................................................................12

SPECIFICATIONS .................................................................13

ENVIRONMENTAL SPECIFICATIONS.............................................13

MANUFACTURING .....................................................................13

POWER CONSUMPTION ..............................................................13

MEAN TIME BETWEEN FAILURES (MTBF)..................................13

PHYSICAL DIMENSIONS .............................................................13

APPENDIX A - TROUBLESHOOTING ....................................14

APPENDIX B - HOW TO GET ASSISTANCE..........................16

APPENDIX C - ELECTRICAL INTERFACE ............................17

RS-232.....................................................................................17

RS-422.....................................................................................17

RS-530.....................................................................................18

RS-485.....................................................................................18

20 MA CURRENT LOOP .............................................................19

APPENDIX D - ASYNCHRONOUS COMMUNICATIONS ..........20

APPENDIX E - SILK-SCREEN...............................................21

APPENDIX F - SCHEMATIC .................................................22

APPENDIX G - COMPLIANCE NOTICES...............................23

COMPLIANCE NOTICES......ERROR! BOOKMARK NOT DEFINED.

FEDERAL COMMUNICATIONS COMMISSION STATEMENT..............23

EMC DIRECTIVE STATEMENT....................................................23

WARRANTY.........................................................................24

Figures

Figure 1 - Address Selection Table........................................................2

Figure 2 - DIP-Switch Illustration.........................................................2

Figure 3 - Header E2 and E3, IRQ Selection........................................3

Figure 4 - Header E2 options.................................................................4

Figure 5 - Header E1 RS-232 Interface Selected..................................5

Figure 6 - Header E1 RS-530/422 Interface Selected ...........................6

Figure 7 - Header E1 RS-485 Interface Selected..................................7

Figure 8 - Header E1 20 mA Current Loop Interface Selected............8

Figure 9 - Asynchronous Communications Bit Diagram ....................20

Introduction

Omega Engineering OMG-SIO-530 Page 1

Introduction

Overview

The OMG-SIO-530 provides the PC with one asynchronous serial port

which can interface to RS-232, RS-422, RS-485, and 20 mA Current Loop

devices.

What’s Included

The OMG-SIO-530 is shipped with the following items. If any of these

items are missing or damaged, contact the supplier.

• OMG-SIO-530 Serial I/O Adapter

• 3.5” Serial Utility Diskette

• User Manual

Factory Default Settings

The OMG-SIO-530 factory default settings are as follows:

Base Address IRQ Electrical Specification

3F8 4 RS-232

To install the OMG-SIO-530 using factory default settings, refer to

Installation on page 9.

For your reference, record installed OMG-SIO-530 settings below:

Base Address IRQ Electrical Specification

Card Setup

Omega Engineering OMG-SIO-530 Page 2

Card Setup

The OMG-SIO-530 contains several jumper straps which must be set for

proper operation.

The OMG-SIO-530 occupies 8 consecutive I/O locations. A DIP-switch is

used to set the base address for these locations. Be careful when selecting

the base address as some selections conflict with existing ports. The

following table shows several examples that typically do not cause a

conflict. SW1 sets the I/O address for the OMG-SIO-530.

Address Binary Switch Position Setting

Hex A9 A0 1 2 3 4 5 6 7

280-287 1010000XXX Off On Off On On On On

2A0-2A7 1010100XXX Off On Off On Off On On

2E8-2EF 1011101XXX Off On Off Off Off On Off

2F8-2FF 1011111XXX Off On Off Off Off Off Off

3E8-3EF 1111101XXX Off Off Off Off Off On Off

300-307 1100000XXX Off Off On On On On On

328-32F 1100101XXX Off Off On On Off On Off

3F8-3FF 1111111XXX Off Off Off Off Off Off Off

Figure 1 - Address Selection Table

The following illustration shows the correlation between the DIP-switch

setting and the address bits used to determine the base address. In the

example below, address 300 is selected as a base. Address 300 in binary is

XX11 0000 0XXX where X = a non-selectable address bit.

1 2 3 4 5 6 7 8

ENA3A9

Figure 2 - DIP-Switch Illustration

Note: Setting the switch “On” or “Closed” corresponds to a “0” in the

address, while leaving it “Off” or “Open” corresponds to a “1”.

Refer to Appendix A for common address contentions.

Card Setup

Omega Engineering OMG-SIO-530 Page 3

Port Enable / Disable

Each port on the OMG-SIO-530 can be enabled or disabled with switch

position 8 on the DIP-switch. The port is enabled with the switch “On” or

“Closed” and disabled when “Off” or “Open”. If any port is disabled, be

sure to disable the interrupt request for that port by removing the IRQ

jumper.

IRQ Selection

Header E3 selects the interrupt request for the serial port. If COM1: is

selected, this jumper must be on the IRQ4 setting. If COM2: is selected,

this jumper must be on IRQ3. Consult your particular software for IRQ

selection. If no interrupt is desired, remove the jumper.

M N 7 5 4 3 2

Figure 3 - Header E2 and E3, IRQ Selection

Position “M” & “N” allow the user to select a single interrupt per port

mode or a shared interrupt mode. The “N” selects the single interrupt per

port mode, which is the typical DOS, OS/2 and Windows 3.1 mode of

operation. The “M” selects the shared interrupt mode, which allows more

than one port to access a single IRQ, and indicates the inclusion of a 1K

ohm pull-down resistor required on one port when sharing interrupts.

This mode is used by software that requires COM3: and COM4: to share

interrupts with COM1: and COM2: or in an OEM configuration to

support a specific software application.

Note: Most communications software applications default COM3: to

IRQ4 and COM4: to IRQ3. This requires the sharing of interrupts

between COM1: and COM3:, and between COM2: and COM4:.

While this is the default, it is not always the preferred setting.

Check your software configuration instructions to determine the

most appropriate IRQ selection.

Note: The actual Silk-Screen for the OMG-SIO-530 may have a “2” in

place of the IRQ “2/9” selection.

Card Setup

Omega Engineering OMG-SIO-530 Page 4

Interface Selection

Headers E1 and E2 connect the DB-25 connector (P1) to either RS-232

interface drivers / receivers, RS-422/485 interface drivers / receivers or to

the Current Loop receiver interface.

Note: On E2 you must move all eight push-on jumpers. This is required

to completely isolate RS-232 signals from RS-422/485 and vice-

versa. On E1, however, there are several jumper options.

E2 jumper settings

RS-232

RS-530/422/485

20 mA Current Loop

Figure 4 - Header E2 options

Card Setup

Omega Engineering OMG-SIO-530 Page 5

E1 Jumper setting for RS-232

GND

CTS

DSR

DCD

Figure 5 - Header E1 RS-232 Interface Selected

GND Ground “A” selects normal ground for RS-232.

EN Enable “A” (Not Applicable to RS-232).

CL Current Loop “A” selects RS-232 Receive Data.

RI Ring Indicator “A” enables RI, “B” sets it true.

DCD Data Carrier Detect “A” selects RS-232.

DSR Data Set Ready “A” selects RS-232.

CTS Clear To Send “A” selects RS-232.

RD Receive Data “A” selects RS-232.

Card Setup

Omega Engineering OMG-SIO-530 Page 6

E1 Jumper setting for RS-530 and RS-422

GND

CTS

DSR

DCD

Figure 6 - Header E1 RS-530/422 Interface Selected

GND Ground “B” selects 100 Ohm ground for RS-530/422.

EN Enable “A” position for RS-530.

CL Current Loop “A” selects RS-530 Receive Data.

RI Ring Indicator (not used on RS-530) “B” sets it true.

DCD Data Carrier Detect “B” selects RS-530.

DSR Data Set Ready “B” selects RS-530.

CTS Clear To Send “B” selects RS-530.

RD Receive Data “B” selects RS-530.

Card Setup

Omega Engineering OMG-SIO-530 Page 7

E1 Jumper setting for RS-485

GND

CTS

DSR

DCD

Figure 7 - Header E1 RS-485 Interface Selected

GND Ground “B” selects 100 Ohm ground for RS-485.

EN Enable driver with RTS “B” .”A” is always enabled.

CL Current Loop “A” selects RS-485 Receive Data.

RI Ring Indicator not used on RS-485 “B” sets it true.

DCD Data Carrier Detect “B” selects RS-485.

DSR Data Set Ready “B” selects RS-485.

CTS Clear To Send “B” selects RS-485.

RD Receive Data “B” selects RS-485.

E1 position “EN” is used to enable the driver with RTS. To permanently

enable the driver (normal RS-422 point to point mode) remove jumper

“EN” at E1. Failure to correctly set this jumper can cause transmitter

contention problems, preventing operation by any nodes on the network.

E1 position “GND” determines whether the board provides a direct

ground connection (as in RS-232 and most RS-422), or a 100 Ohm high

impedance ground. The 100 Ohm high impedance ground is normally

used in RS-485 (and some RS-422) to avoid ground loop currents with

long cables.

Card Setup

Omega Engineering OMG-SIO-530 Page 8

E1 Jumper setting for 20 mA Current Loop

GND

CTS

DSR

DCD

Figure 8 - Header E1 20 mA Current Loop Interface Selected

GND Ground “A” selects normal ground for Current Loop.

EN N/A

CL Current Loop “B” selects Current Loop receive data.

RI Ring Indicator not used, “B” sets it true.

CD N/A

DSR N/A

CTS N/A

RD Receive Data - Remove or “Float” on one pin for Current Loop.

Installation

Omega Engineering OMG-SIO-530 Page 9

Installation

The OMG-SIO-530 can be installed in any of the PC expansion slots, but

to access the “AT” or (E)ISA IRQ’s (10, 11, 12, 15) it must be installed in

one of the 16 bit slots. The OMG-SIO-530 contains several jumper straps

for each port which must be set for proper operation prior to installing the

adapter into the computer.

1. Turn off PC power. Disconnect the power cord.

2. Remove the PC case cover.

3. Locate an available slot and remove the blank metal slot cover.

4. Gently insert the OMG-SIO-530 into the slot. Make sure that the

adapter is seated properly.

5. Replace the screw.

6. Replace the cover.

7. Connect the power cord.

Installation is complete.

Technical Description

Omega Engineering OMG-SIO-530 Page 10

Technical Description

The OMG-SIO-530 provides one async serial port which can interface to

RS-232, RS-530, RS-422, RS-485, and 20 mA Current Loop.

Features include:

• DB-25 male connector mounted on board bracket. Port can be

addressed as COM1:- 4, or any other I/O address up to 3FF Hex.

• Interrupt Request (IRQ) lines are jumper selected for IRQ 3,4,5

and 2/9.

• RS-232C Interface with all standard PC signals (TD, RD, RTS, CTS,

DSR, DCD, DTR, RI) or RS-530/422 interface .

• Serial port interface (RS-232, RS-530/422/485, 20 mA Current Loop)

is determined by jumper selection.

The OMG-SIO-530 is designed for asynchronous only operation and

therefore implements only those signals associated with async operation.

The DTE mode for RS-530 is assumed.

The OMG-SIO-530 utilizes the 16550 UART chip. This chip features

programmable baud rate, data format, interrupt control and has a 16 byte

transmit and receive FIFO. The OMG-SIO-530 can be addressed as

COM1:, COM2:, or any other I/O address up to 3FF Hex, providing total

compatibility with most communications software and languages. RS-232,

RS-530/422/485, and 20 mA Current Loop compatible drivers and

receivers are provided on the serial port.

Technical Description

Omega Engineering OMG-SIO-530 Page 11

Connector Pin Assignments

RS-232

Signal Name Pin # Mode

GND Ground 7

RD Receive Data 3 Input

CTS Clear To Send 5 Input

DSR Data Set Ready 6 Input

DCD Data Carrier Detect 8 Input

RI Ring Indicator 22 Input

DTR Data Terminal Ready 20 Output

TD Transmit Data 2 Output

RTS Request To Send 4 Output

RS-530/422/485

Signal Name Pin # Mode

GND Ground 7

RDB RX+ Receive Positive 16 Input

RDA RX- Receive Negative 3 Input

CTSB CTS+ Clear To Send Positive 13 Input

CTSA CTS- Clear To Send Negative 5 Input

DSRB DSR+ Data Set Ready Positive 22 Input

DSRA DSR- Data Set Ready Negative 6 Input

DCDB DCD+ Data Carrier Detect Positive 10 Input

DCDA DCD Data Carrier Detect Negative 8 Input

TDB TX+ Transmit Positive 14 Output

TDA TX- Transmit Negative 2 Output

RTSB RTS+ Request To Send Positive 19 Output

RTSA RTS- Request To Send Negative 4 Output

DTRB DTR+ Data Terminal. Ready Positive 23 Output

DTRA DTR- Data Terminal Ready Negative 20 Output

RS-530/422/485 Line Termination

Typically, each end of the RS-530/422/485 bus must have line terminating

resistors. A 100 ohm resistor is across each RS-530/422/485 input in

addition to a 1K ohm pull-up/pull-down combination that bias the receiver

inputs.

Technical Description

Omega Engineering OMG-SIO-530 Page 12

20 mA Current Loop

Signal Name Pin #

Current Source #1 21

TD+ Transmit Data Positive 25

RD+ Receive Data Positive 12

Current Source #2 9

TD- Transmit Data Negative 24

RD- Receive Data Negative 11

Ground 7

To perform a loop-back test, connect pins 21 to 25, 24 to 12, and 11 to 7.

Current Loop Connections

Passive Connection

Loop Input: Pin 12 (RD+) to Customer Current Source

Pin 11 (RD-) to Customer TD+ output

Loop Output: Pin 25 (TD+) to Customer Current Source

Pin 24 (TD-) to Customer RD+ Input

Active Connection

Loop Input: Pin 21 (Current Source 1) to Pin 12 (RD+)

Pin 11 (RD-) to Customer TD+

From Customer TD- to Pin 7 (Ground )

Loop Output: Pin 9 (Current Source 2) to Pin 25 (TD+)

Pin 24 (TD-) to Customer RD+

From Customer RD- to Pin 7 (Ground )

Specifications

Omega Engineering OMG-SIO-530 Page 13

Specifications

Environmental Specifications

Specification Operating Storage

Temperature

Range

0º to 50º C

(32º to 122º F )

-20º to 70º C

(-4º to 158º F)

Humidity Range

10 to 90% R.H.

Non-Condensing

10 to 90% R.H.

Non-Condensing

Manufacturing

• IPC 610-A Class-III standards are adhered to with a 0.1 visual A.Q.L.

and 100% Functional Testing.

• All Omega Engineering Printed Circuit boards are built to U.L. 94V0

rating and are 100% electrically tested. These printed circuit boards

are solder mask over bare copper or solder mask over tin nickel.

Power Consumption

Supply line

+12 VDC -12 VDC +5 VDC

Rating

50 mA 50 mA 195 mA

Mean Time Between Failures (MTBF)

Greater than 150,000 hours. (Calculated)

Physical Dimensions

Board length 4.9 inches (12.446 cm)

Board Height including Goldfingers 4.2 inches (10.66 cm)

Board Height excluding Goldfingers 3.9 inches (9.91 cm)

Appendix A - Troubleshooting

Omega Engineering OMG-SIO-530 Page 14

Appendix A - Troubleshooting

A Serial Utility Diskette is supplied with the Omega Engineering adapter

and will be used in the troubleshooting procedures. By using this diskette

and following these simple steps, most common problems can be

eliminated without the need to call Technical Support.

1. Identify all I/O adapters currently installed in your system. This

includes your on-board serial ports, controller cards, sound cards etc.

The I/O addresses used by these adapters, as well as the IRQ (if any)

should be identified.

2. Configure your Omega Engineering adapter so that there is no

conflict with currently installed adapters. No two adapters can occupy

the same I/O address.

3. Make sure the Omega Engineering adapter is using a unique IRQ.

While the Omega Engineering adapter does allow the sharing of

IRQ’s, many other adapters (i.e. SCSI adapters & on-board serial

ports) do not. The IRQ is typically selected via an on-board header

block. Refer to the section on Card Setup for help in choosing an I/O

address and IRQ.

4. Make sure the Omega Engineering adapter is securely installed in a

motherboard slot.

5. Use the supplied diskette and User Manual to verify that the Omega

Engineering adapter is configured correctly. The supplied diskette

contains a diagnostic program “SSD” that will verify if an adapter is

configured properly. This diagnostic program is written with the user

in mind and is easy to use. Refer to the “README” file on the

supplied diskette for detailed instructions on using “SSD”.

Appendix A - Troubleshooting

Omega Engineering OMG-SIO-530 Page 15

6. The following are known I/O conflicts:

• The 278 and 378 settings may conflict with your printer I/O

adapter.

• 3B0 cannot be used if a Monochrome adapter is installed.

• 3F8-3FF is typically reserved for COM1:

• 2F8-2FF is typically reserved for COM2:

• 3E8-3EF is typically reserved for COM3:

• 2E8-2EF is typically reserved for COM4:

7. Please refer to your included diskette for any post production manual

updates and application specific information.

8. Always use the Omega Engineering diagnostic software when

Troubleshooting a problem. This will eliminate the software issue

from the equation.

Appendix B - How To Get Assistance

Omega Engineering OMG-SIO-530 Page 16

Appendix B - How To Get Assistance

Please refer to Appendix A - Troubleshooting prior to calling Technical

Support.

1. Read this manual thoroughly before attempting to install the

adapter in your system.

2. When calling for technical assistance, please have your user

manual and current adapter settings. If possible, please have

the adapter installed in a computer ready to run diagnostics.

3. Omega Engineering maintains a Web site at

WWW.OMEGA.COM where the latest manuals and

software revisions may be found

4. Technical support is available Monday to Friday from 8:30

a.m. to 6:00 p.m. Eastern time. Technical support can be

reached at (800)826-6342 x2295.

RETURN AUTHORIZATION MUST BE OBTAINED FROM

OMEGA ENGINEERING BEFORE RETURNED MERCHANDISE

WILL BE ACCEPTED. AUTHORIZATION CAN BE OBTAINED

BY CALLING OMEGA ENGINEERING AND REQUESTING A

RETURN MERCHANDISE AUTHORIZATION (RMA) NUMBER.

Appendix C - Electrical Interface

Omega Engineering OMG-SIO-530 Page 17

Appendix C - Electrical Interface

RS-232

Quite possibly the most widely used communication standard is RS-232.

This implementation has been defined and revised several times and is

often referred to as RS-232 or EIA/TIA-232. It is defined by the EIA as

the Interface between Data Terminal Equipment and Data Circuit-

Terminating Equipment Employing Serial Binary Data Interchange. The

mechanical implementation of RS-232 is on a 25 pin D sub connector.

RS-232 is capable of operating at data rates up to 20 Kbps at distances

less than 50 ft. The absolute maximum data rate may vary due to line

conditions and cable lengths. RS-232 often operates at 38.4 Kbps over

very short distances. The voltage levels defined by RS-232 range from -12

to +12 volts. RS-232 is a single ended or unbalanced interface, meaning

that a single electrical signal is compared to a common signal (ground) to

determine binary logic states. A voltage of +12 volts (usually +3 to +10

volts) represents a binary 0 (space) and -12 volts (-3 to -10 volts) denotes

a binary 1 (mark). The RS-232 and the EIA/TIA-574 specification defines

two type of interface circuits, Data Terminal Equipment (DTE) and Data

Circuit-terminating Equipment (DCE). The Omega Engineering adapter

is a DTE interface.

RS-422

The RS-422 specification defines the electrical characteristics of balanced

voltage digital interface circuits. RS-422 is a differential interface that

defines voltage levels and driver/receiver electrical specifications. On a

differential interface, logic levels are defined by the difference in voltage

between a pair of outputs or inputs. In contrast, a single ended interface,

for example RS-232, defines the logic levels as the difference in voltage

between a single signal and a common ground connection. Differential

interfaces are typically more immune to noise or voltage spikes that may

occur on the communication lines. Differential interfaces also have

greater drive capabilities that allow for longer cable lengths. RS-422 is

rated up to 10 Megabits per second and can have cabling 4000 feet long.

RS-422 also defines driver and receiver electrical characteristics that will

allow 1 driver and up to 32 receivers on the line at once. RS-422 signal

levels range from 0 to +5 volts. RS-422 does not define a physical

connector.

Appendix C - Electrical Interface

Omega Engineering OMG-SIO-530 Page 18

RS-530

RS-530 (a.k.a. EIA-530) compatibility means that RS-422 signal levels

are met, and the pin-out for the DB-25 connector is specified. The EIA

(Electronic Industry Association) created the RS-530 specification to

detail the pin-out, and define a full set of modem control signals that can

be used for regulating flow control and line status. The RS-530

specification defines two types of interface circuits, Data Terminal

Equipment (DTE) and Data Circuit-Terminating Equipment (DCE). The

Omega Engineering adapter is a DTE interface.

RS-485

RS-485 is backwardly compatible with RS-422; however, it is optimized

for partyline or multi-drop applications. The output of the RS-422/485

driver is capable of being Active (enabled) or Tri-State (disabled). This

capability allows multiple ports to be connected in a multi-drop bus and

selectively polled. RS-485 allows cable lengths up to 4000 feet and data

rates up to 10 Megabits per second. The signal levels for RS-485 are the

same as those defined by RS-422. RS-485 has electrical characteristics

that allow for 32 drivers and 32 receivers to be connected to one line. This

interface is ideal for multi-drop or network environments. RS-485 tri-state

driver (not dual-state) will allow the electrical presence of the driver to be

removed from the line. The driver is in a tri-state or high impedance

condition when this occurs. Only one driver may be active at a time and

the other driver(s) must be tri-stated. The output modem control signal

Request To Send (RTS) controls the state of the driver. Some

communication software packages refer to RS-485 as RTS enable or RTS

block mode transfer. RS-485 can be cabled in two ways, two wire and four

wire mode. Two wire mode does not allow for full duplex communication,

and requires that data be transferred in only one direction at a time. For

half-duplex operation, the two transmit pins should be connected to the

two receive pins (Tx+ to Rx+ and Tx- to Rx-). Four wire mode allows full

duplex data transfers. RS-485 does not define a connector pin-out or a set

of modem control signals. RS-485 does not define a physical connector.

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Omega OMG-SIO-530 Owner's manual

Brand: Omega

Model: OMG-SIO-530

Category: Networking

Type: Owner's manual

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Omega OMG-SIO-530 Owner's manual

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